LTH Low Temperature Merchandisers

Transcription

1 LTH Low Temperature Merchandisers Installation & Operation Manual IMPORTANT Keep in store for future reference! MANUAL- I/O LTH SC P/N _G JUNE 2015 Spanish French

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3 P/N _G iii Merchandiser must operate for 24 hours before loading product! Regularly check merchandiser temperatures. Do not break the cold chain. Keep products in cooler before loading into merchandiser. These merchandisers are designed for pre-frozen products only. IMPORTANT KEEP IN STORE FOR FUTURE REFERENCE Quality that sets industry standards! St. Charles Rock Road Bridgeton, MO U.S. & Canada Mexico Hussmann Corporation

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5 TABLE OF CONTENTS v ANSI Z535.5 DEFINITIONS... vi INSTALLATION NSF Certification Hussmann Product Control Location Shipping Damage Self Contained (Location) Unloading Exterior Loading Shipping Skid Model Description Cabinet Leveling Door Seal Serial Plate Location Door Lock Shelf Installation Lamps Door Switch Stocking Condensing Unit Air Flow Load Limits LTH Illustrations ELECTRICAL / REFRIGERATION Plug Refrigeration Defrost Cycle START UP / OPERATION MAINTENANCE Care and Cleaning Exterior Surfaces Interior Surfaces Cleaning Shelves Cleaning Condenser Coils Optional Reversing Condenser Fan Cleaning the ash Out Drain Tips and Troubleshooting SERVICE Replacing Fluorescent Lamps Replacing Display Lamp Replacing Interior Lamps Replacing Electronic Ballasts APPENDIX A TECHNICAL DATA Part Numbers... A-1 Refrigeration Data... A-5 Defrost Data... A-5 Physical Data.... A-5 LTH - Electrical Data... A-6 LTH - Dimensions... A-6 LTH-8S iring Diagrams... A-8 LTH-18 iring Diagrams... A-9 LTH-45, 68 iring Diagram... A-10 ARRANTY Operating Safe-NET III Controls Start-Up / Operation Alarms and Codes Defrost Termination Switch Manual Defrost Temperature Adjustment Typical Sensor to Control Configuration Sequence of Operation - LTH Merchandisers Controls and Adjustments Thermostatic Expansion Valve TEV Adjustment HUSSMANN CORPORATION BRIDGETON, MO U.S.A. LTH Merchandisers

6 vi REVISION HISTORY REVISION G New wiring diagrams, changed ambient temp Page 1-1; Maintenance, 4-2, updated charts, Page A-5, A-6 * * * * * * * * * * * * * * * * * * * * * * * * * * ANSI Z535.5 DEFINITIONS DANGER Indicate[s] a hazardous situation which, if not avoided, will result in death or serious injury. Revision F Sensor Location, Page 3-5, 3-6; Removed Type 2, Page 1-1; Added California arning, Page 1-3; Removed Safe-NET 1 references, Section 2; New Part Numbers, Section 5; New iring Diagrams, Section A; Cut-in, Cut-out, Page A-5. ARNING Indicate[s] a hazardous situation which, if not avoided, could result in death or serious injury. CAUTION Indicate[s] a hazardous situation which, if not avoided, could result in minor or moderate injury. Revision E Eliminate barcode from the front page Eliminate IR Logo from pages 24 (3-6), 25 (3-7), 27 (3-9), 52 (last page). Update revision letter (D to E, all pages with the revision) and the Date. Removed Picture of LED receptacles on Page 2-1; Changed LED and Fluorescent Electrical requirements on (left Column wording) NOTICE Not related to personal injury Indicates[s] situations, which if not avoided, could result in damage to equipment. Revision D December 2010 Added Air Flow Drawing, Page, 1-2 Added Model Description, Page, 1-3 Added Serial Plate Location, Page 1-5 Revised Stocking Illustrations, Page 1-7 Added Sequence of Operation Diagram, Page 3-5 Added Appendix A Revision C June 2009 Added LTH-45 and LTH-68 models Updated wiring diagrams Added Safe-NET I codes Added Safe-NET III information Revision B Added Safe-NET Restructured manual; added Maintenance information Revision A Original Issue P/N _G U.S. & Canada Mexico

7 P/N _G 1-1 INSTALLATION NSF CERTIFICATION These merchandisers are manufactured to meet ANSI / National Sanitation Foundation (NSF ) Standard #7 requirements. Proper installation is required to maintain certification. Near the serial plate, each case carries a label identifying the type of application for which the case was certified. ANSI/NSF-7 Type I - Display Refrigerator / Freezer Intended for 75 F / 55% RH Ambient Application ANSI/NSF-7 - Display Refrigerator Intended for Bulk Produce HUSSMANN PRODUCT CONTROL The serial number and shipping date of all equipment is recorded in Hussmann s files for warranty and replacement part purposes. All correspondence pertaining to warranty or parts ordering must include the serial number of each piece of equipment involved. This is to ensure the customer is provided with the correct parts. LOCATION These merchandisers are designed for displaying products in air conditioned stores where temperature is maintained at or below the ANSI / NSF-7 specified level and relative humidity is maintained at or below 55%. Recommended operating ambient temperature is between 65 F (18 C) with a maximum 55% relative humidity to 75 F (23.9 C) with a maximum 55% relative humidity. Placing refrigerated merchandisers in direct sunlight, near hot tables or near other heat sources could impair their efficiency. Like other merchandisers, these self-contained units are sensitive to air disturbances. Air currents passing around merchandisers will seriously impair their operation. Do NOT allow air conditioning, electric fans, open doors or windows, etc. to create air currents around the case. LTH units in take air and exhaust air through the front of the case, and require no clearance space on top, at the back or either side. Product should always be maintained at proper temperature. This means that from the time the product is received, through storage, preparation and display, the temperature of the product must be controlled to maximize the life of the product. SHIPPING DAMAGE All equipment should be thoroughly examined for shipping damage before and during unloading. This equipment has been carefully inspected at our factory. Any claim for loss or damage must be made to the carrier. The carrier will provide any necessary inspection reports and/or claim forms. Apparent Loss or Damage If there is an obvious loss or damage, it must be noted on the freight bill or express receipt and signed by the carrier s agent; otherwise, carrier may refuse claim. Concealed Loss or Damage hen loss or damage is not apparent until after equipment is uncrated, retain all packing materials and submit a written response to the carrier for inspection, within 15 days. HUSSMANN CORPORATION BRIDGETON, MO U.S.A..HUSSMANN.COM LTH Manual

8 1-2 Installation SELF CONTAINED (LOCATION) Product should always be maintained at proper temperature. This means that from the time the product is received, through storage, preparation and display, the temperature of the product must be controlled to maximize the life of the product. Be sure to position self contained merchandisers properly. SELF CONTAINED models have vented base panels to allow air circulation through the condensing unit. Allow for a minimum 36 in. clearance in the front. Blocking or restricting air flow will adversely affect performance and may damage the refrigeration system. 36 in. 36 in. Air Exhaust Front (Plan View) Rear Air Intake Zero Clearance at Sides and Rear 36 in. Clearance at Front Air Intake LTH-8/18 LTH in. LTH-45 Air Intake Air Exhaust Air Exhaust Front (Plan View) Rear Front (Plan View) Rear P/N _G Air Intake Zero Clearance at Sides and Rear 36 in. Clearance at Front Air Intake Zero Clearance at Sides and Rear 36 in. Clearance at Front U.S. & Canada Mexico HUSSMANN.COM

9 P/N _G 1-3 UNLOADING Unloading from Trailer: Lever Bar (also known as a Mule, Johnson Bar, J-Bar, Lever Dolly, or Pry Lever) Move the merchandiser as close as possible to its permanent location and remove all packaging. Check for damage before discarding packaging. Remove all separately packed accessories such as kits and shelves. Improper handling may cause damage to the merchandiser when unloading. To avoid damage: 1. Do not drag the merchandiser out of the trailer. Use a Johnson bar (Mule). 2. Use a forklift or dolly to remove the merchandiser from the trailer. Remove the top of the crate and detach walls from each other. Lift crate from the skid. Unscrew the case from the skid. The merchandiser can now be lifted off the crate skid. Lift only at base of skid! Remove any braces and/or skids attached (blanket wrapped merchandiser may have skids). DO NOT TILT MERCHANDISER ON ITS SIDE OR END HEN REMOVING SKID. Once the skid is removed, the merchandiser must be lifted NOT PUSHED to reposition. To remove the skid, remove screws attaching skid to the merchandiser. Check floor where merchandisers are to be set to if it is a level area. Determine the highest part of the floor. For California Businesses: Do NOT stand or walk on top of merchandiser. Do not store items or flammable materials atop the unit. EXTERIOR LOADING Do NOT walk on top of the merchandiser or damage to the merchandisers and serious personal injury could occur. merchandisers are not structurally designed to support excessive external loading such as the weight of a person. Do not place heavy objects on the merchandiser. SHIPPING SKID Each merchandiser is shipped on a skid to protect the merchandiser s base and to make positioning the case easier. This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. This warning is the result of the California State law known as the California Safe Drinking ater and Toxic Enforcement Act of 1986, which is commonly referred to as Proposition 65. This warning does not mean that Hussmann products will cause cancer or reproductive harm, or is in violation of any product-safety standards or requirements. As clarified by the California State government, Proposition 65 can be considered more of a right to know law than a pure product safety law. hen used as designed, Hussmann believes that our products are not harmful. e provide the Proposition 65 warning to stay in compliance with California State law. It is your responsibility to provide accurate Proposition 65 warning labels to your customers when necessary. For more information on Proposition 65, please visit the California State government website. HUSSMANN CORPORATION BRIDGETON, MO U.S.A..HUSSMANN.COM LTH Manual

10 1-4 Installation MODEL DESCRIPTION LTH merchandisers are low temperature selfcontained cabinets, designed for pre-packaged frozen food or products that require frozen temperatures for conservation. Design features include: Self-closing glass doors Electronic controls CFC-free foam insulation Lighted Sign (except LTH-8S) Door lock Cassette refrigeration system Do NOT remove shipping crate until the merchandiser is positioned for installation. Available options are: Reversing condenser fan motor Buzzer alarm CABINET LEVELING This merchandiser must be installed level (from back to front, and side to side) to allow maximum draining of the condensate water as well as proper door alignment and operation. Choose a level area to install case. LTH-8S and LTH-18 cases have one adjustable cabinet foot at each bottom corner for easy adjustment if required. LTH45 and LTH68 also have an adjustable foot at center front and back. Turn the foot levelers clockwise to add length to each foot for leveling. Adjustable Foot Thumbscrew Lock hen optional 6-inch legs are used, screw the legs tight to the merchandiser base and then adjust the feet. hen optional casters are used, screw them tight to the merchandiser base. Once in final position, lock each caster. Lock Each Caster P/N _G U.S. & Canada Mexico HUSSMANN.COM

11 P/N _G 1-5 DOOR SEAL Check that hinge doors close automatically by opening the door 45 degrees and releasing. Ensure door closes and gasket seals door shut. To adjust the torque applied to the hinged door: 1. Place a wrench on each of the two lower support nuts located at the bottom hinge. 2. Loosen the lower nut while holding the upper nut in place. SERIAL PLATE LOCATION The serial plate is located at the interior left side of the merchandiser s cabinet. It contains all pertinent information such as model, serial number, amperage rating, refrigerant type and charge. DOOR LOCK A door lock is standard on all doors. The key is tie-wrapped to the door handle at shipment. 3. Torque is increased or decreased by rotating the top nut. After adjustments are made, tighten the bottom nut while holding the upper nut in place. Torque bottom nut to a minimum of 20 ft-lb. Adjust Door Closing Torque HUSSMANN CORPORATION BRIDGETON, MO U.S.A..HUSSMANN.COM LTH Manual

12 1-6 Installation SHELF INSTALLATION After the cabinet is leveled, the shelves may be installed. ire shelves are adjustable. Shelf spacing can be adjusted by positioning the shelf clips according to individual loading requirements. LTH-8S merchandisers have three movable wire shelves and one solid shelf. LTH-18, LTH-45 and LTH-68 merchandisers have four movable wire shelves and one solid shelf, per door. NOTE: The movable wire shelves may be reversed so that the wire shelf lip is positioned in the front as a product stop. Shelves Solid Shelf Door Lock NOTE: Do not move the Solid Shelf at the front of case LAMPS Case Front Solid Shelf Never Block Air Opening This merchandiser has a light switch that operates both the display and the interior lamps. Interior lamps are equipped with a plastic shield for safety. DOOR SITCH Door Switch Light Switch The merchandiser s door switch controls the evaporator fan motor. The switch shuts the evaporator fan off when the door is opened. This reduces energy consumption and helps prevent product temperatures from increasing from the door being opened and closed. Display Lamp with Cover Removed P/N _G U.S. & Canada Mexico HUSSMANN.COM

13 P/N _G 1-7 STOCKING Product should NOT be placed in case until merchandiser is at proper operating temperature. The LTH merchandisers must remain in operation for at least 24 hours before product may be loaded into case cabinet. Proper rotation of product during stocking is necessary to prevent product loss. Always bring the oldest product to the front and set the newest to the back. No product within 4 inches of top Air exhaust and return grille must remain open and free of obstruction at all times. Do not allow product, packages, signs, etc. to block air exhaust or return grille. Do not use non-approved shelving, baskets, display racks, or any accessory that could hamper air curtain performance. Do not stock product in the top four inches of LTH cases because product will block the cold air flow. CONDENSING UNIT AIR FLO Load Limit for LTH-8S Merchandisers No product within 4 inches of top An optional reversing condenser fan is available for all LTH models. The condenser fan runs in reverse during the defrost cycle to clear the condenser coil of debris that was accumulated during the refrigeration cycle. LOAD LIMITS Product must be within designated load limit to ensure proper refrigeration and air curtain performance. Load Limit for LTH-18, LTH-45 and LTH-68 Merchandisers At no time should product be stocked: Beyond the front of shelves Near the air exhaust duct located at the top rear of case Near or covering the front return air grille ithin four inches of the top of the cabinet (This space must be free of product and other materials.) DO NOT LOAD CASE ITH ARM PRODUCT. HUSSMANN CORPORATION BRIDGETON, MO U.S.A..HUSSMANN.COM LTH Manual

14 1-8 Installation LTH Illustrations LTH-8S LTH-18 LTH-45 LTH-68 P/N _G U.S. & Canada Mexico HUSSMANN.COM

15 P/N _G 2-1 ELECTRICAL / REFRIGERATION PLUG The plug cord is 9 ft long and is located on the right hand rear of the merchandiser. Disconnect power before servicing. LTH merchandisers require a dedicated electrical circuit with ground. 12AG is the minimum sized acceptable wire. ALAYS CHECK THE SERIAL PLATE FOR COMPONENT AMPERES Merchandiser must be grounded. Do not remove the power supply cord ground. The LTH-8S and LTH-18 require a dedicated 15 AMP/115V circuit with grounded wall receptacle (NEMA 5-15R). The LTH-45 requires a dedicated 15 AMP/ V circuit with a grounded wall receptacle (NEMA 6-15R). The LTH-68 requires a dedicated 20 AMP/ V circuit with a grounded wall receptacle (NEMA 6-20R). Always use a dedicated circuit with the amperage stated on the unit. Plug into an outlet designed for the plug. Do not overload the circuit Do not use long or thin extension cords. Never use adapters. If in doubt, call an electrician. Risk of Electric Shock. If cord or plug becomes damaged, replace only with a cord and plug of the same type. Nominal Minimum Maximum Voltage Voltage Voltage LOCK OUT / TAG OUT To avoid serious injury or death from electrical shock, always disconnect the electrical power at the main disconnect when servicing or replacing any electrical component. This includes, but is not limited to, such items as doors, lights, fans, heaters, and thermostats. HUSSMANN CORPORATION BRIDGETON, MO U.S.A..HUSSMANN.COM LTH Manual

16 2-2 Electrical / Refrigeration REFRIGERATION Each LTH merchandiser have Safe-NET III controls. Safe-NET III Display from the interior side of the door. Defrost is initiated by Safe-NET III control, and is terminated according to coil temperature. In the event the sensor does not terminate the defrost cycle, a fail-safe value is programmed to terminate on time. All LTH merchandisers are factory set with three defrost cycles, every 8 hours. ith Safe-NET III, the defrost cycle is initiated at start-up and every 8 hours thereafter. If the power is interrupted, the defrost resets to this time. The defrost can be reset to a desired time by unplugging and restarting the merchandiser at the preferred time. After the defrost cycle, evaporator fans are delayed from starting to prevent water from being blown out of the evaporator pan. Fans are also delayed during initial startup for approximately 10 minutes. Safe-NET III Control All LTH merchandisers are equipped with a hermetic compressor. The condenser has a fin and tube construction. Cold discharge air flows from the top air duct on the back of the case. Air is returned through the bottom front return air grille. DEFROST CYCLE All LTH merchandisers require defrost cycles for proper operation. The defrost cycles are factory set. Merchandisers are set to defrost three times each day. During defrost, the evaporator fans operate intermittently to clear any condensation Evaporator Fans Note: To reduce accumulation of frost on the evaporator coil, the fans will cycle off with each door opening and back on as the door closes. The evaporator fans also cycle ON and OFF during the defrost. The fans cycles for 10 seconds every two minutes. The fan cycles increase defrost efficiency. P/N _G U.S. & Canada Mexico HUSSMANN.COM

17 P/N _G 3-1 OPERATING Safe-NET III CONTROLS START UP / OPERATION The Safe-NET III electronic temperature and defrost controller is located in the cassette compartment. The controller comes factory set at position #5 and is ready to go. The temperatures can be adjusted by rotating the knob counter-clockwise for a warmer setpoint, or clockwise for a colder setpoint. The display shows the setpoint for a few seconds when changed, then reverts to showing the sensed temperatures in the merchandiser. The adjustment knob allows the user to select a pre-configured cold setpoint, warm setpoint or any setpoint within this range. The adjustment knob is also configured with Off/ On functionality to power off the controller. The off position shuts off the compressor only. Safe-NET III Controller Location The front grille must be removed in order to access this control. To remove the grille, open the door and remove the two plastic screws and retainers on the top of the grille, then tilt out and lift up to remove. UNPLUG THE UNIT FOR SERVICE. Position #5 Remove Plastic Screws Remove Plastic Screws hen removing the grille for this operation or for condenser cleaning, care must be taken not to damage the display interface cable. It may be unplugged during this task. Interface Cable Plug Unplug Interface Cable The top, or green, LED indicates the case is in refrigeration mode. The center, or yellow, LED indicates the case is in defrost mode. The bottom (red) LED indicates an alarm condition, such as merchandiser warming up because the door is not closed. Compressor Powered on GREEN Defrost Cycle YELLO Alarm RED Off / On Position Safe-NET III Indicators HUSSMANN CORPORATION BRIDGETON, MO U.S.A..HUSSMANN.COM LTH Manual

18 3-2 Start up / Operation START-UP / OPERATION The defrost cycle is initiated at power on. (This cycle will quickly terminate on the initial start-up of a warm merchandiser.) Another defrost cycle will follow every 8 hours thereafter. The defrost times will reset whenever power is interrupted. Therefore, the standard defrost times can be reset by interrupting power (full stop, then start) at the desired time. This will reset the initial time and restart the 8-hour cycle. During the compressor-on time (1 minute), or compressor-off time (2 minutes), built-in protection time will delay the defrost initiation. If you force a defrost cycle during this time, the feature will initiate but not start until the compressor protection mode times out. ALARMS AND CODES Safe-NET III is available with an audible alarm (located in the display module) that sounds in the event a failure occurs. Flashing Temperature or Sensor Alarm LED, E1 or E2 If the Temperature or Sensor Alarm LED (red) on the controller and display is flashing, a temperature sensor has failed (or sensor is disconnected). The display shows E1 if the case sensor has failed (or disconnected) or E2 if the evaporator sensor has failed (it is disconnected). If the merchandiser sensor fails, refrigeration will run continuously. Turn off, or repeat a duty cycle of a few minutes on and a few minutes off. Troubleshooting Alarm or Code Indicates Action Red LED Firmware Call Service remains ON corruption on immediately after startup controller Controller is not operating Red LED turns Case Make sure the door on during temperature is closed operation is too warm Make sure that cold or too cool air is not being blocked or deflected Check the temperature using the optional display or a thermometer If the LED does not turn off after on hour, call Service Red LED Temperature Check the optional flashes sensor failure display for error code E1 indicates E1 or E2 and call a case Service immediately temperature failure E2 indicates an evaporator temperature sensor failure P/N _G U.S. & Canada Mexico HUSSMANN.COM

19 P/N _G 3-3 DEFROST TERMINATION SITCH Merchandisers may use a defrost termination switch, instead of an evaporator sensor to terminate a defrost cycle. The defrost termination switch is temperature activated and senses the completion of defrost. On Compressor Compressor Off Time If On Time If Sensor Failed Sensor Failed Compressor or Refrigeration Status Off On Off On Off Time MANUAL DEFROST Note: This procedure initiates a manual or forced defrost. 1 2 I 3 arm I Cold 7 1. Note location of knob setting I arm I Cold 2. Rotate knob fully counterclockwise until it stops (full I arm I Cold 3. After 10 seconds, but before 20 seconds, rotate knob fully clockwise until it stops (full cold position) IMPORTANT: Return the control knob to its original setting (Step 1) once the manual defrost has been initiated. HUSSMANN CORPORATION BRIDGETON, MO U.S.A..HUSSMANN.COM LTH Manual

20 Start up / Operation Display - at Full Cold Model LTH ARM COLD "OFF" Position Safe-NET III Control Set at Full Cold Position Display - at #1 Position Model LTH ARM COLD Safe-NET III Control # 1 Position TEMPERATURE ADJUSTMENT 1. Rotate the adjustment knob counter clockwise for a warmer setpoint or clockwise for a colder setpoint. 2. hile adjusting the temperature, the display shows the setpoint (cut out value). A few seconds after the temperature is set, the controller reverts to the sensed temperature in the merchandiser. The control has protective settings to prevent short cycling of the compressor. A. The compressor may run for up to 60 sec. after Step 2 is completed. Start the 10 sec. count down for Step 3, once the display is blank. B. The defrost initiation may be delayed for up to 120 sec. after Step 3 is completed. 3. To verify merchandiser settings, turn the dial to warm and cold as shown above. Output readings should be within one degree of the temperatures shown above. P/N _G U.S. & Canada Mexico HUSSMANN.COM

21 P/N _G 3-5 Typical Sensor to Control Configuration The LTH-8S & LTH-18 sensors are located on the cassette as shown below. LTH-45 and LTH-68 have two cassettes, the Sensors are located on the right hand cassette. Yellow Sheath in. MM Black Sheath Black (Air Sensor #8) Black (Evaporator Sensor #9) Not Used #11 hite (Common both Sensors #10) HUSSMANN CORPORATION BRIDGETON, MO U.S.A..HUSSMANN.COM LTH Manual

22 3-6 Start up / Operation Sequence of Operation LTH Merchandisers 1 NOTE: The 65 C Version Controller includes a Parameter Code Number. This number indicates what program has been loaded into the controller. hen the Controller is first powered up or is turned off and then back on a 2 digit Parameter Code Number will display for 3 seconds. Then the Self Check will Start. 1a. The Safe-NET Parameter Code is 50 for LTH-8S, LTH-45 and LTH-68. The Parameter Code is 75 for the LTH-18. If the case is warm at initial start-up, the defrost will be initiated and will terminate almost immediately. (Display will lock in current temperature when defrost is initiated.) 1b. If the case is cold (as if it is turned off and then back on), the defrost cycle will continue until the termination temperature is reached or the fail-safe time has expired. 2 The compressor will start 10 seconds after the power is applied. 3 The compressor will run for 10 minutes. Then, defrost will be initiated. 4 During defrost, the display will show the temperature before defrost, and it will continue to show this temperature for 1 hour. Compressor will turn back on once coil is defrosted. 5 The compressor will continue to run until it reaches its cut-out temperature (pull down). 6 The refrigeration cycle will continue until the next scheduled (8 hours) or demand defrost. 7 3 and 4 will repeat until power is interrupted. NOTE: If power is interrupted, sequence will start at 4. Defrost will be initiated and the time to subsequent defrost will reset. P/N _G U.S. & Canada Mexico HUSSMANN.COM

23 P/N _G 3-7 Controls and Adjustments Refrigeration Controls Defrost Controls Model Product Application Discharge Air Temperature Defrost Frequency (per day) Type of Defrost Termination Temperature Failsafe Time (Minutes) LTH (All) Frozen Food 3 Electric The Safe-NET III Controller controls refrigeration temperature. This is factory installed in the control panel. Adjust this control knob to maintain the discharge air temperature shown. Measure discharge air temperatures at the center of the discharge air opening. Defrosts are time initiated and temperature terminated for self contained. The defrost setting is factory set as shown above. To ensure a thorough defrost, defrost must be terminated by the temperature termination setting not by time. LOCK OUT / TAG OUT To avoid serious injury or death from electrical shock, always disconnect the electrical power at the main disconnect when servicing or replacing any electrical component. This includes, but is not limited to, such items as doors, lights, fans, heaters, and thermostats. HUSSMANN CORPORATION BRIDGETON, MO U.S.A..HUSSMANN.COM LTH Manual

24 3-8 Start up / Operation THERMOSTATIC EXPANSION VALVE (TEV) Each self contained merchandiser has its own evaporator coil and a pre-set thermostatic expansion valve (TEV). The TEV has been factory set at design conditions to provide the recommended performance. Remove the fan panel to expose the thermostatic expansion valve. TEV ADJUSTMENT Expansion valves may be adjusted to fully feed the evaporator. Before attempting to adjust valves, make sure the evaporator is clear or only lightly covered with frost, and the merchandiser is within 10 F of its expected operating temperature. Adjust the valve as Follows: a. Attach a probe to the suction line near the expansion valve bulb. b. Obtain a pressure reading from the factory installed Schraeder valve. Convert the pressure reading to a saturated temperature for the refrigerant. Temperature (b) minus Temperature (a) is the superheat. The valve should be adjusted so that the greatest difference between the two temperatures is 3 F to 5 F. Make adjustments of no more than 1 /2 turn of the valve stem at a time and wait for at least 15 minutes before rechecking the probe temperature and making further adjustments. P/N _G U.S. & Canada Mexico HUSSMANN.COM

25 P/N _G 4-1 MAINTENANCE Interior Surfaces Do not use ammonia-based products to To reduce the risk of fire, electrical shock or injury when cleaning this merchandiser: Unplug the merchandiser before cleaning; Keep all liquids away from electrical and electronic components; Do not use any mechanical device or other means to speed the defrost process, except as recommended by the manufacturer. CARE AND CLEANING Long life and satisfactory performance of any equipment is dependent upon the care it receives. To ensure long life, proper sanitation and minimum maintenance costs, this unit should be thoroughly cleaned, all debris removed and the interiors washed down. Cleaning often will control or eliminate odor buildup. Frequency of cleaning is dependent on usage and local health requirements. Do not use HOT water on COLD glass surfaces. This can cause the glass to shatter and could result in personal injury. Allow glass fronts, ends and service doors to warm before applying hot water. Exterior Surfaces The exterior surfaces must be cleaned with a mild detergent and warm water to protect and maintain their attractive finish. Never use abrasive cleaners or scouring pads. Never use caustic soda, kerosene, gasoline, thinner, solvents, detergents, acids, chemicals or abrasives. Do not use ammonia-based cleaners on acrylic parts. clean light shields. Never use abrasive cleansers or scouring pads. The interior surfaces may be cleaned with most domestic detergents and sanitizing solutions with no harm to the surface. Always read and follow the manufacturer s instructions when using any cleaning product. Do NOT Use: Abrasive cleansers and scouring pads, as these will mar the finish. Coarse paper towels on coated glass. Ammonia-based cleaners on acrylic parts. A hose on lighted shelves or submerge the shelves in water. Solvent, oil or acidic based cleaners on any interior surfaces. A hose on rail lights, canopy lights or any other electrical connection. Do: First turn off refrigeration, then disconnect electrical power. Remove product and loose debris. Thoroughly clean all surfaces with soap and hot water. Do not use steam or high water pressure hoses to wash the interior. These destroy merchandiser s sealing causing leaks and poor performance. Take care to minimize direct contact between fan motors and cleaning or rinse water. Rinse with hot water, but do NOT flood. Allow merchandiser to dry before resuming operation. ipe down lighted shelves with a damp sponge or cloth so that water does not enter the light channel. Do not use a hose or submerge shelves in water. After cleaning is completed, restore power and turn on the merchandiser. HUSSMANN CORPORATION BRIDGETON, MO U.S.A..HUSSMANN.COM LTH Manual

26 4-2 Maintenance Product will be degraded and may spoil if allowed to sit in a non-refrigerated area. Next, detach the merchandiser s electrical wire harness located on the right hand side near the coil. For Safe-NET III, detach the interface cable to the display. Cleaning Shelves Shelves and shelf clips are easily removed for cleaning the interior as well as the shelves themselves Cleaning Condenser Coils To maintain peak operating efficiency, the coil should be cleaned at least once each month. A dirty coil slows product cooling significantly and increases energy consumption by as much as 20%. Dirt buildup on coils can also cause the compressor to lock up damaging the condenser unit. Unplug Safe-NET III Interface Cable Interface Cable Plug Remove screws on top of each side of the louvered from grille, then lift off the grille. Remove Screws at Top of Grille (LTH-18 shown) Unplug Power Harness P/N _G U.S. & Canada Mexico HUSSMANN.COM

27 P/N _G 4-3 Use a soft hand brush attachment on a vacuum to remove accumulated dust and debris. Consult an authorized service technician if more extensive cleaning is needed. If the refrigeration unit is damaged, it can be replaced with a new cassette. Optional Reversing Condenser Fan Remove Screws Holding Cassette Remove the two screws securing refrigeration unit cassette in place. Use the center black bar to pull the refrigeration unit s cassette forward to access the coils. If your merchandiser is equipped with the optional reversing condenser fan, you may notice the condenser fan running during the defrost cycle. This is normal in this application. The purpose of reversing the air direction during defrost is to remove lint and dust that accumulates on the condenser fin surfaces during the refrigeration cycle. This feature reduces the need to clean the condenser manually, and increases compressor life because of lower condensing temperatures. Use only the center bar to pull out the cassette. Pulling on refrigeration lines or other parts will cause damage to the refrigeration unit. IMPORTANT INFORMATION For prompt service when contacting the factory, be sure to have the case model and serial number from the case serial plate. Center Bar LOCK OUT / TAG OUT To avoid serious injury or death from electrical shock, always disconnect the electrical power at the main disconnect when servicing or replacing any electrical component. This includes, but is not limited to, such items as doors, lights, fans, heaters, and thermostats. Use Center Bar to Pull Cassette Cleaning the ash Out Drain HUSSMANN CORPORATION BRIDGETON, MO U.S.A..HUSSMANN.COM LTH Manual

28 4-4 Maintenance The wash out drain is located behind the refrigeration cassette and can be cleaned with water and wiped with a soft cloth. Ensure drain is unobstructed before replacing cassette. The washout drain flows into an auxiliary waste line. ash Out Drain Next remove the auxiliary waste line cap to drain any excess water. Place a dry towel over the line to absorb water. Replace cap, cables and cassette. Drain TIPS AND TROUBLESHOOTING There are a few simple things to check before calling for service: 1. Product not cold? Refrigeration unit requires 24 hours at initial startup to cool down to operating temperature with no product loaded in merchandiser. Ask when merchandiser was stocked, and what the usage has been. It may take 30 minutes or more for product to chill following stocking. 2. Check the door and door seal for air leaks. 3. Power Supply: Is the unit plugged in? Is there power to the unit? 4. Location hat are the ambient conditions temperature and humidity, direct sun, nearby source of heat, such as oven or grill? Is the unit level? Has the unit been moved recently? 5. Shelves and Stocking Are the standard shelves in the correct places? Is the product stocked properly? Is the bottom shelf at the proper location? Auxiliary aste Line 6. Confirm that the defrost schedule is properly set using Safe-NET I. Check for Safe-NET error messages. Cable IMPORTANT INFORMATION Cap Replace Cap, Cables and Cassette For prompt service when contacting the factory, be sure to have the case model and serial number from the case serial plate. P/N _G U.S. & Canada Mexico HUSSMANN.COM

29 P/N _G 5-1 SERVICE REPLACING DISPLAY LAMP LOCK OUT / TAG OUT To avoid serious injury or death from electrical shock, always disconnect the electrical power at the main disconnect when servicing or replacing any electrical component. This includes, but is not limited to, such items as doors, lights, fans, heaters, and thermostats. Disconnect power to the merchandiser. Remove plastic pins attaching the display lamp panel. There are three pins at the bottom of the display cover and two on top of the display panel. Remove the merchandiser s display cover panel and change out the lamp. Replace the display panel cover. REPLACING FLUORESCENT LAMPS Fluorescent lamps have a plastic shield. hen the lamp is replaced, keep the lamp shield to install over the new lamp.. Pin The switch under the display lamp cover operates both the display lamp and interior lamps. Plastic Shield Fluorescent Lamp Remove Plastic Pins Attaching Display Lamp Remove Plastic Pins Attaching Display Lamp Display Cover Panel Removed HUSSMANN CORPORATION BRIDGETON, MO U.S.A..HUSSMANN.COM LTH Manual

30 5-2 Service REPLACING INTERIOR LAMPS LTH merchandisers have interior case lamps. The lamps are protected by a clear, plastic shield. Remove the shield to replace lamp. edge a small putty knife at the top rear of the lamp, then carefully loosen the shield from the side of the merchandiser. Bow Shield to Replace REPLACING ELECTRONIC BALLASTS edge Putty Knife at Top Rear of Display Lamp Once the shield is out of rear track, the lamp shield can be removed from the merchandiser. Remove lamp shield and change out lamp. Replace lamp shield at bottom corner bracket first. The electronic ballast or LED power supply for the LTH-8S is located on the refrigeration cassette. This ballast operates the interior lamp. The electronic ballast or LED power supply for the LTH-18, LTH-45 and LTH-68 is located on the top of the merchandiser under a sheet metal enclosure. (LTH-68 shown.) To access the ballast or LED power supply, the protective enclosure is removed by removing screws as shown below. Remove Shield from Display Lamp For LEDs, follow the same steps to remove the shield. Then pull out the LED fixture respecting the fixture position. Next, bow lamp shield and replace shield into top corner bracket. Smooth shield to ensure a good replacement fit for the lamp shield. P/N _G U.S. & Canada Mexico HUSSMANN.COM

31 P/N _G Appendix A Technical Data A Models LTH8S LTH-18 LTH-45 LTH-68 Standard Parts Description Part Number Power Cord (NEMA 5-15P) 19S216 X X Power Cord (NEMA 6-15P) X Power Cord (NEMA 6-20P) X Door Switch (fans) 03S121 X X X X Light Switch X X X X Defrost Sensor (Yellow) 1.5MM X X X X Air Sensor (Black) 1.5MM X X X X Safe-Net III Controller 65C X X X Safe-Net III Controller 65C X Safe-Net III Display (F ) 65C 1H X X X X Safe-Net III Display Interface Cable 1M X X X X Safe-Net IIIControl Harness X Safe-Net IIIControl Harness X Safe-Net IIIControl Harness X X Compressor Relay (T92P11A22-120) X X Compressor Relay (T92P11A22-240) X X Heater Relay (T92P7A22-240) X X Time Relay (TGC2030SC2J) X X Pilaster Strip (30") X Pilaster Strip (42") X X X Shelf Clips (insert into pilaster strips) X X X X Fan Delay Thermostat X X X X Defrost Heater Limit Thermostat X X X X ire Shelf (hite) 15.5 X X ire Shelf (hite) 22 X X X ire Shelf (hite) 22 X X X Interior Light Cover X Interior Light Cover X X X Top Hinge Cover X Feet (Adjustable) X X X X Lamp Shield X Lamp Shield X Lamp Shield X X Lamp (F25T8/SPX41 RS GE) X Lamp (T5 FQ54/840 HO) X Lamp (FO32/ X X Light Harness (w/ Lamp holders) X Light Harness (w/ Lamp holders) X X Lamp Holder X Lamp Cap X Assy Lens Mullion X X HUSSMANN CORPORATION BRIDGETON, MO U.S.A..HUSSMANN.COM LTH Manual

32 5-4 A-2 ServiceAppendix A Technical Data Standard Parts Continued Ballast Modification (w/connections added) X Ballast (Robertson RP1420) X Ballast (HSG4-UNV-T8-IS) X Door LH Black X Door LH Black X Door LH Black X X Door RH Black X Door Gasket X Door Gasket X Door Gasket X X Torsion Rod X X X X Door Bushing X X X X Door Lock X X X X Door Handle (Black) X X X X Plastic Lower Front Grille (KO for SNIII) X Plastic Lower Front Grille (KO for SNIII) X Plastic Lower Front Grille (KO for SNIII) X Plastic Lower Front Grille (KO for SNIII) X PTM Bottom Shelf X PTM Bottom Shelf X X Models LTH8S LTH-18 LTH-45 LTH-68 Upper Lighted Canopy Part Number Plastic Display 1H X Plastic Display X Plastic Display X Lamp Holder X X X Lamp (F17T8/SPX41) X Lamp (FO32/841 32) Interior lamps also X Lamp (F30 T8/C) X Ballast (QTP2X54T5HO/UNV PSN) X Ballast (HSG4-UNV-T8-IS) Interior lamps also X Ballast (HSG2-UNV-T8-IS) X P/N _G U.S. & Canada Mexico HUSSMANN.COM

33 P/N _G Appendix A Technical Data A Refrigeration Part Number Compressor (Embraco NT2178GKV) 1H12397 X Compressor (NT2192GKV) X Compressor (NT2178GK) X Compressor (NJ2212GK) X Condenser 1H12549 X Condenser (On LTH45 RH Cassette) X X X Condenser (On LTH45 LH Cassette) X X Condenser Fan Motor X Condenser Fan Motor X Condenser Fan Motor Assy (Motor,Blade & Mtg Brkt) X X Condenser Fan Motor X X Condenser Fan Blade X Condenser Fan Blade X X X Evaporator Fan Motor Assy (Motor,Blade, & Brkt) X X Evaporator Fan Blade (FV600C30P3B) X X X X Evaporator Fan Motor (SSC B138 JHEM1) X X Evaporator Fan Motor Assy (Motor,Blade, & Brkt) X Evaporator Fan Motor X X Evaporator Fan Motor Assy (Motor,Blade, & Brkt) X Evaporator Coil 1H12309 X Evaporator Coil X Evaporator Coil X Evaporator Coil X Accumulator X X X X TXV (Sweat)R404A TUB# X TXV (Sweat)R404A EXPT52 MOD 068Z X X TXV (Sweat)R404A TUB orifice#5 068U X Filter Drier (Sporlan C-032S) X X X Drier (Danfoss 023Z5129) X Condenser Gasket 1H13191 X Condenser Gasket X Condenser Gasket X Condenser Gasket X Evaporator Gasket X Evaporator Gasket X Evaporator Gasket X Evaporator Gasket X CRO (CRO-4-0/50) X HUSSMANN CORPORATION BRIDGETON, MO U.S.A..HUSSMANN.COM LTH Manual

34 5-6 ServiceAppendix A Technical Data A-4 Heaters Part Number Defrost Heater 1H13190 X Defrost Heater X Defrost Heater X Defrost Heater X Door Frame AS Heater X Door Frame AS Heater X Door Frame AS Heater X X Case perimeter AS Heater X Case perimeter AS Heater X Case perimeter AS Heater (2) X X Sheel Metal Replacement Parts Painted All these part numbers below are painted assemblies Bottom Solid Shelf Assy X Bottom Solid Shelf Assy X Bottom Solid Shelf Assy LH X X Bottom Solid Shelf Assy RH X X Bottom Solid Shelf Assy Center X Bottom Shelf Cover (Stainless Steel) X Bottom Shelf Cover (Stainless Steel) X Bottom Shelf Cover LH (Stainless Steel) X X Bottom Shelf Cover RH (Stainless Steel) X X Bottom Shelf Cover Center (Stainless Steel) X Door Hinge Lower X X X* * Door Hinge Lower X** X** Hinge Plate Upper Assy (w/ pin) X Door Hinge Assy Upper X X X Door Lock Bracket X X X X *(1) On LTH45 for LH Dr & (1) on LTH68 for LH Dr **(1) On LTH-45 for RH Door & (2) on LTH68 for Center & RH Dr. P/N _G U.S. & Canada Mexico HUSSMANN.COM

35 P/N A _G Appendix A Technical Data 5-7 REFRIGERATION DATA Dimensions shown as inches and (mm). LTH-8S, LTH-18, LTH-45, LTH-68 Thermostat Setting CI/CO ( F) Models LTH-8S, LTH-45, LTH-68 Position #1 5º F / -5º F Positions #7-18º F / -28º F Models LTH-18 Position #1 0º F / -5º F Positions #7-23º F / -28º F Compressor (hp) LTH-8S 1 /2 hp LTH-18 1 hp LTH-45 1 /2 hp x 2 LTH-68 3/4 hp x 2 Condensing Unit Capacity LTH-8S 1834 LTH LTH x 2 LTH x 2 at -30º F evaporator and 110º F condenser temperature Note: This data is based on store temperature and humidity that does not exceed 75 F and 55% R.H. unless otherwise stated. Schedule defrost at night while lights are off. DEFROST DATA Frequency (hr) 8 Offtime Failsafe (minutes) All models 50 Defrost Termination Temperature (F) 48 Refrigerant Charge PHYSICAL DATA LTH-8S 10 oz kg LTH oz kg LTH oz kg (each cassette) LTH oz kg (each cassette) HUSSMANN CORPORATION BRIDGETON, MO U.S.A..HUSSMANN.COM LTH Manual

36 5-8 ServiceAppendix A Technical Data A-6 LTH Dimensions Model Doors Refrig. Model Doors Refrig. Cu. Ft. Capacity Cu. Ft. Capacity Dimensions Exterior Interior (useable) Dimensions Exterior Interior (useable) 5 /8 5 /8 5 /8 3 /4 5 /8 1 /8 5 /8 3 /8 3 /4 3 /8 1 /2 5 /8 5 /8 5 /8 3 /4 3 /4 5 /8 1 /2 1 /8 5 /8 1 /4 3 3 /4 3 1 /4 /4 13 /16 /8 3 /8 1 /2 *Note: Depth dimension D includes 1½ in. for door handle **Note: Overall height includes1½ in. for leveling pods 1 /4 3 /4 3 /4 1 /4 1 /2 13 /16 LTH Electrical Data Electrical * Electrical * * * *Estimated energy consumption for optional LEDs P/N _G U.S. & Canada Mexico HUSSMANN.COM

37 P/N A _G Appendix A Technical Data 5-9 Electrical Data Note: These are rated values for individual components and should not be added together to determine total merchandiser electrical load. Evaporator Fans 115V, 60Hz Standard for LTH-8S/18, V for LTH-45/68 LTH-8S LTH-18 LTH-45 LTH-68 Number of Motors Amperes atts Condensing Unit (115V, 1Ph, 60Hz) Standard for LTH 8S/18, V for LTH 45/68 Compressor LRA Compressor RLA Product Data LTH-8S Interior Volume (Cu Ft/Case) LTH-18 Interior Volume (Cu Ft/Case) LTH-45 Interior Volume (Cu Ft/Case) LTH-68 Interior Volume (Cu Ft/Case) 10.7 ft 3 /case ( liters /case) 22 ft 3 /case ( liters /case) 41.1 ft 3 /case ( liters /case) ft 3 /case ( liters /case) ESTIMATED SHIPPING EIGHT 2 Case LTH-8S LTH-18 LTH-45 LTH lb (141kg) 535 lb (243kg) 1014 lb (460kg) 1036 lb (470kg) 2 Actual weights will vary according to optional kits included. HUSSMANN CORPORATION BRIDGETON, MO U.S.A..HUSSMANN.COM LTH Manual

38 5-10 ServiceAppendix A iring Diagrams A-8 LTH-8S ELECTRIC SPECS MODEL: LTH8S VOLTAGE: 115 V FRECUENCY: 60 HZ COMPRESSOR: NT2178GK EMBRACO ARNING UNPLUG THE EQUIPMENT BEFORE SERVICING ADVERTENCIA: DESCONECTAR EL EQUIPO ANTES DE HACER CUALQUIER REPARACI N, PARA EVITAR ALGUN DA O. LIGHT FLUORESCENT LIGHT SITCH BALLAST POER SUPPLY GND GND DOOR SITCH LAMP LED THERMOSTAT SENSOR AIR TEMP THERMOSTAT SENSOR TEMP DEFROST DIODE FRAME HEATER H E ATE R P H AS E F A N BLACK SHEATH SAFENET III CONTROL PH AS E CO MP NA LIN E2 L I NE 1 B K B K YELLO SHEATH SERIAL HACCP 2 M LINK PROG DISPLAY KEY HEATED GLASS Y B R BL OPTIONAL HEATER CABINET HEATER T-LIMIT FAN DELAY EVAPORATOR FAN Y HEATER DEFROST 0 1 NC 3 7 NC COM8 4 COM NO 6 2 NO _C CONDENSER FAN C COMPRESSOR 2 GRD S R V 60HZ 1HP NEMA 5-15 P ARNING All components must have mechanical ground, and the merchandiser must be grounded. Circled Numbers = Parts List Item Numbers R = Red Y = Yellow G = Green BL = Blue = Black = hite = 120V Power = 120V Neutral = Field Ground = Case Ground P/N _G U.S. & Canada Mexico HUSSMANN.COM

39 A-9 P/N _G Appendix A iring Diagrams 5-11 LTH-18 NEMA 5-15 P 115 V 60HZ 1HP ELECTRIC SPECS MODEL: LTH18 VOLTAGE: 115 V FRECUENCY: 60 HZ COMPRESSOR: NT2192GKV EMBRACO ARNING UNPLUG THE EQUIPMENT BEFORE SERVICING GRD THERMOSTAT SENSOR AIR TEMP THERMOSTAT SENSOR TEMP DEFROST ADVERTENCIA: DESCONECTAR EL EQUIPO ANTES DE HACER CUALQUIER REPARACI N, PARA EVITAR ALGUN DA O. HEA TER PH ASE FAN BLACK SHEATH SAFENET III CONTROL PHA SE COM PNA LIN E2 LIN E1 B K B K YELLO SHEATH SERIAL HACCP LINK 2 M DISPLAY PROG KEY B R BL DEFROST RELAY Y DOOR SITCH EVAPORATOR FANS FAN DELAY 0 1 NC 3 7 NC COM 8 4 COM NO 6 2 NO DEFROST HEATER CONDENSER FAN 0 1 NC 3 7 NC COM 8 4 COM NO 6 2 NO COMPRESSOR RELAY COMPRESSOR S C R LIGHT SITCH INTERIOR LED INTERIOR LED POER SUPPLY (MODELS ITH HEATED GLASS ONLY) DIODE FRAME HEATER SIGN LED INTERIOR LAMP BALLAST INTERIOR LAMP HEATED GLASS SIGN LAMP BALLAST LIGHT FLUORESCENT DOOR PERIMETER HEATER _G ARNING All components must have mechanical ground, and the merchandiser must be grounded. Circled Numbers = Parts List Item Numbers R = Red Y = Yellow G = Green BL = Blue = Black = hite = 120V Power = 120V Neutral = Field Ground = Case Ground HUSSMANN CORPORATION BRIDGETON, MO U.S.A..HUSSMANN.COM LTH Manual